Product News

With the acceleration of the automotive intelligence, electrification, and industrial automation processes, complex electronic systems have extremely high requirements for the performance of electronic components, covering many aspects such as precise control, efficient operation, temperature protection, and current monitoring. This series of demands has opened up a vast market space for intelligent power switch chips.

As an industry leader, Reactor-micro, leveraging its on - board application experience with numerous clients, has been continuously dedicated to product research and development as well as technological innovation. The newly launched intelligent low - side switch RM54050SS is now available for the market. The following is a detailed introduction to the product:

 I. Product Overview

RM54050SS is a single - channel 50mΩ intelligent low - side switch. It integrates functions such as over - voltage protection, over - temperature protection, current - limiting protection, and short - circuit protection, and is widely used in automotive electronics and industrial fields. This product can replace traditional vehicle - mounted fuses and relays, and protect the low - voltage loads inside the vehicle.

II. Core Parameters

III. Introduction to Main Functions1. Inductive Load and Over - voltage Output Clamping RM54050SS is internally designed with a dedicated inductive load demagnetization clamping circuit, which can protect the circuit when the inductive load is turned off or the power supply experiences over - voltage. After over - voltage or when the inductive load is turned off, when the VDS voltage increases to the breakdown threshold of VAZ, VAZ conducts. At this time, the power MOS operates in the linear region for free - wheeling, but the free - wheeling energy cannot exceed the maximum value of EAS.

2. Short - circuit Current - limiting Protection

RM54050SS is internally equipped with a short - circuit current - limiting circuit. Its main principle is that when a short - circuit occurs in the device or the overload current rises instantaneously, it causes a rapid increase in the device temperature, triggering OTP (Over - temperature Protection). The device will enter the hiccup mode and attempt to restart. If the device temperature drops to the OTP point after the fault is removed, the device will restart successfully.

The following is the timing diagram of short - circuit current - limiting:

 IV. Application Circuit

In the field of automotive electronics, RM54050SS is widely used in ECU modules such as Body Control Module (BCM) and Vehicle Control Unit (VCU). It can control low - voltage loads individually or be used in combination with high - side switches. The usage method depends on the design of the electrical control circuit of the client.

RM54050SS is now undergoing verification tests at multiple automotive electronics clients. If you are interested in placing an order or encounter technical problems in product applications, please call the contact numbers immediately: （86）29 - 88827769/18009231253. Our professional technical team is on standby at any time and will provide you with more efficient and reliable solutions.